<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<script>

var indexedDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.msIndexedDB;

if(indexedDB){
    alert("支持");
}
else {
    alert("不支持");
}

</script>
</body>
</html>